test commit
add url recognition for differernt media types
refine code style for hash definition in song_url function
add timeout and retry logic for some non-downloadable songs
secure URL parser for different ruby version
Merge branch 'master' of https://github.com/EagleChen/baidu_ting

Conflicts:
	bin/baidu_ting.rb
	lib/baidu_ting.rb
fix minor bugs in certification and hash layout
Merge pull request #2 from MyImperial/master

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